But your W$SD seems too high. I have been a bit confused by the W$SD stat, I think it is a bit of a balancing act between calling too much if your number is too low, and not calling enough on the river if your number is too high. the advice i got from Leakbuster when my number was on the higher end, was that "you are likely folding too many winners on the river"

and i found this on the holdem manager forum from the creator of LB -

"When this number gets too high, it's an indicator that you're not taking as many hands to showdown as you should. EX: If you're folding when you are getting 2:1 odds on the river, but you expect to lose about 28% of the time when you make this call, then you are going to push up the percentage of your W$SD%, because you're missing some +EV calls. "

Hy!
River call efficiency shouldn't have to be under 1,5. If that's the case consider folding more on the river with marginal hands because chances are you're calling down too light.
You can filter these situations using two filters if you have HM:
-one for calling river continuation bets
-the other for calling river non-cbets.
I don't remember now the exact settings for these filters but I take a look in HM if you want me to. And keep in mind that you need a bigger sample size because this is a river stat so this needs alot more hands to become somewhat accurate.

To answer your other question, other useful stats are WWSF, WTSD.
If WWSF is under 44 (standard range being between 44-50) then you are passive postflop. This stat tells you how hard are you fighting for pots so if you are below 44 then you don't raise enough postflop either for value or as a (semi)bluff. This usually comes with a higher WTSD (standard value being between 24-28).